Secondhand Vape Exposure: Effects, Who's at Risk, and More The health risks of secondhand smoke are widely understood. But what about secondhand vaping? Is Second Hand Vapor from E Cigarettes Dangerous? [Infographic] Techno FAQ What Are the Risks from Secondhand Vape Smoke? NVB Inc. Secondhand Smoke Vermont Department of Health According to a Centers for Disease Control and Prevention (CDC) study, 40% of U.S. adults believe that children's exposure to secondhand aerosol from e cigarettes causes only some or little harm, and 5%